[Bug]: Hippocampus cannot be given horse armor or a chest of any kind

[RustBandit]

What happened?

No matter what I try my Hippocampus accept saddles, but no form of horse armor or chests.

Minecraft Version

1.20.1

Ice and Fire version

2.1.13 beta 5

Citadel version

2.6.2

Relevant log output

Other Information

• I am using other mods besides Ice and Fire
• I have attached a log file from the session that I have experienced this issue